Buy the KTC H27T27S.

Same screen size, real jump in sharpness. That's not a spec you'll ever stop noticing.

What was compared

Acer 27in FHD 1920x1080 IPS 120Hz Gaming Monitor | Office KB272 G0bi | 1ms, AdaptiveSync, ... — $99.99
KTC 27 Inch QHD 144Hz Gaming Monitor 2K 1440P FreeSync & G-Sync H27T27S | Eye Care, HDR10 ... — $144.99

1. Text and edges stop looking fuzzy
Cramming 1080p onto a 27 inch panel like the Acer stretches every pixel thin, and owners of 27in 1080p screens report text and edges getting fuzzy up close. The KTC packs roughly 78% more pixels into the same size at 1440p, so browsing, spreadsheets and games all read noticeably crisper.
2. Bright scenes pop, not wash out
The KTC supports HDR10, giving real contrast between bright and dark in games and movies that use it. The Acer KB272 lists no HDR support at all, so highlights stay flat no matter what you're watching.
3. Smoother motion when frames spike
144Hz on the KTC beats the Acer's 120Hz for competitive shooters actually pushing real frame rates. Unless you're chasing every frame in fast multiplayer games, you won't notice past 120Hz, and that covers most casual buyers.
4. Works cleanly with either GPU brand
The KTC explicitly supports both FreeSync and G-Sync, staying tear-free whether you run AMD or Nvidia. The Acer only lists generic AdaptiveSync, leaving proper G-Sync behaviour unconfirmed.
5. Yes it costs $45 more. Buy it anyway.
The Acer is cheaper and comes from a more established brand, and if you genuinely cannot stretch past $100 it's a fine budget panel. But you look at your screen's resolution every second you own it, and 1440p over 1080p at 27 inches changes that daily, not occasionally. The extra $45 buys the upgrade you'll actually use.