bear in mind that diode lasers are weak and quite specific in what they can do.
usually with an all in one the output is between 500mw (almost useless) to 1500 mw (useful for certain things).

A diode laser is actualy very good for marking things. Due to the wavelength of the laser, it will burn most materials.
So marking things like leather, wood, some plastics (some release toxic fumes - so avoid them - vinyl, is the BIG no burn material).
A doide laser can also cut thin card.
It will not cut anything else and it will not engrave on acrylic or glass.

What is good fun is to print something from a filament with wood in it and then engrave it. That actually works really well:
This is a stand I made with wood filament. Couldn't engrave the stand itself so i made and engraved an insert.
I believe this was done with my very first laser - a 1000mw neje type with all of a 2.5 inch cutting area !

These days I've worked up to a 40wat co2 laser.
Man that thing is a proper deathray !

But is the laer comes as a freebie - you'll have some fun with it :-)

As far as the forum members who refuse to understand m,y objection to creality machines.
It's based purely on the mechanics and engineering used.
2 z axis motors are better than one.
A direct drive extruder is better for almost everything than a bowden extruder - I own machines with both.
And the more stable your print bed the fewer issues you will have.
So side support rails are always going to make a more reliable machine that a single central rail.

That's it.
Here's the thing a proper prusa design can print - with a direct drive extruder - at 200mm's. Yes I have done this and while a little rough the prints were dimensionally accurate.

People with ender 3's think that 60-70mm/s is fast.

So you pays your money and makes your choice.
The more information you have, the better.