BenQ W2720i VS BenQ W4100i

In terms of physical design, the two projectors share the same 420 mm width and 310 mm depth, but the W4100i is meaningfully more compact overall: it stands 10 mm shorter and displaces roughly 1,300 cm³ less volume than the W2720i. More notably, the W4100i comes in at 6,100 g versus the W2720i's 6,500 g — a 400 g difference that, while modest on paper, can matter when ceiling-mounting or repositioning the unit frequently.

On the power side, the two diverge in an interesting way: the W4100i consumes 330 W during operation compared to the W2720i's 290 W. This 40 W gap suggests the W4100i likely drives a brighter or more demanding optical engine, which makes its lighter and smaller chassis all the more impressive from an engineering standpoint. Neither unit uses a laser light source, and both share identical 20,000-hour lamp life in standard mode and 30,000 hours in eco mode — meaning long-term maintenance costs and replacement intervals are equal across both models.

Both projectors also include a dedicated smartphone app and carry the same 3-year warranty, so there is no edge to be found in software ecosystem or post-purchase coverage. On general characteristics alone, the W4100i holds a slight physical advantage — it is lighter and more compact despite drawing more power — making it marginally easier to install and live with in tight spaces. The W2720i's lower power draw is a real-world benefit for energy-conscious users, but it is the only trade-off favoring it in this category.

The most impactful differentiator here is brightness: the W4100i delivers 3,200 ANSI lumens versus the W2720i's 2,500 ANSI lumens — a 28% increase that translates directly into a more usable image in rooms with ambient light. For dedicated dark home theaters, both may suffice, but in living rooms with windows or overhead lighting, that extra output buys meaningful headroom before the image washes out.

Screen size potential also sets these two apart. The W4100i can fill a 300-inch screen at its maximum, while the W2720i caps at 200 inches — a significant gap for anyone planning an ultra-large installation. The W4100i does require a slightly longer minimum throw distance (1 m versus 0.9 m), but that 10 cm difference is negligible in practice for most room setups. Meanwhile, the W4100i's 6.5 ms response time edges out the W2720i's 8.7 ms, a difference that matters for fast-motion content and casual gaming, though neither figure is class-leading for competitive play.

Where the two are fully equal is in image quality fundamentals: both output native 4K resolution, process 10-bit color depth, and support the same HDR suite — HDR10, HDR10+, and HLG — with neither offering Dolby Vision. The shared HDR and color pipeline means the quality of the image they produce is governed by the same standards; the W4100i simply delivers that image brighter, bigger, and with marginally faster motion handling. The W4100i holds a clear edge in this category for anyone prioritizing versatile room conditions or large-screen installations.

Both projectors share a solid wireless foundation — Wi-Fi, AirPlay, Chromecast, and Miracast are all present on each model, covering essentially every major screen-mirroring and streaming protocol a modern user is likely to need. The wired side is equally matched with 3 HDMI ports apiece, providing ample inputs for simultaneous connection of a streaming stick, gaming console, and Blu-ray player without any swapping. At this level of overlap, the wireless and primary wired connectivity story is a near-total tie.

The meaningful splits emerge in the secondary ports. The W4100i adds Bluetooth, which the W2720i entirely lacks — a practical win for wirelessly pairing a soundbar or headphones without routing an audio cable. It also offers 3 USB ports versus the W2720i's 2, providing more flexibility for simultaneous connections like a USB drive, dongle, or peripheral. The W2720i counters with an S/PDIF optical audio output — absent on the W4100i — which is the preferred lossless digital audio connection for many AV receivers and older home theater systems. It also retains a VGA port, useful for connecting legacy laptops or presentation equipment that the W4100i simply cannot accommodate.

The result is a deliberate trade-off rather than a clean win for either side. The W4100i is better suited to modern, cable-light setups where Bluetooth audio and extra USB flexibility matter. The W2720i serves users with legacy hardware — particularly those relying on optical audio routing or VGA sources — more capably. Neither is strictly superior; the right choice here depends directly on what the user intends to plug in.

The BenQ W2720i and BenQ W4100i have several similar features, but there are some notable differences. Both projectors include stereo speakers, remote controls, built-in smart TV functionality, built-in speakers, and a 3.5 mm audio jack socket. However, the W2720i has stereo speakers, while the W4100i does not. The W2720i also provides Dolby Atmos support, which is not available on the W4100i.

In terms of lens shift, the W2720i has vertical lens shift but lacks horizontal lens shift, while the W4100i has both vertical and horizontal lens shift. The W2720i has an audio output power of 2 x 5W, while the W4100i has no audio output power listed.

Both projectors feature voice command functionality and do not have an external memory slot. While the W2720i offers Dolby Atmos audio, the W4100i lacks this feature. Overall, the W2720i provides more audio options, while the W4100i offers more flexibility with its lens shift capabilities.