Buy the Dell SE2726H.

The KTC has more pixels on paper, but the Dell is the one you will not be boxing up and shipping back.

What was compared

Dell 27 Monitor - SE2726H - 27-inch FHD (1920x1080) 144Hz 1ms Display, in-Plane Switching ... — $169.99
KTC 27 Inch QHD 144Hz Gaming Monitor 2K 1440P FreeSync & G-Sync H27T27S | Eye Care, HDR10 ... — $139.99

1. Dell owners keep it, KTC buyers send it back
Amazon itself flags the KTC listing as frequently returned, and reviews describe hit-or-miss units with defects. The Dell carries a 4.6-star rating across 138 reviews with no such warning, plus TUV certification backing its build.
2. Colors that hold up from any seat
The Dell uses IPS with consistent 178-degree viewing angles, while the KTC's H27T27S runs an HVA (VA) panel, known for color and contrast shifting off-axis and smearing in fast dark scenes. You are rarely dead-center in real use.
3. Backed by a name that answers the phone
Dell is a mainstream brand with documented warranty support and a TUV Rheinland 3-star eye comfort certification built into the panel. KTC is a lesser-known import brand with unclear warranty terms and no independent eye-comfort certification listed.
4. 144Hz you can actually hit, not chase
Hitting 144fps at 1440p needs a stronger GPU than 1080p does. A mid-range card easily maxes the Dell's 144Hz, while the KTC's QHD panel often falls short without high-end hardware. Unless you already run a 1440p-capable GPU, that extra resolution buys you frames you cannot use.
5. Yes it costs $30 more. Buy it anyway.
The KTC lists at $139.99 against the Dell's $169.99, a real gap on a budget monitor. But that saving disappears fast if you land on one of the units behind Amazon's frequently-returned flag, since a defective panel costs more than $30 in hassle and shipping.