How Significant is the Quality Increase from "Toy" to "Real" Projectors?

How Significant is the Quality Increase from "Toy" to "Real" Projectors?

Toy projectors are the "cheap" ones you find on amazon, aliexpress, etc. Here's a reviewers list of toy projectors. Jayce Review

1. I'm just wondering how those compare to the "real" more expensive ones.

2. Would it matter if I'll be using it in a smallish room (around 2m in width) with little to no light?