Probably many would be interested in your comparison once you finish, especially the $cost analysis...
That's fair. Here's where things currently stand.
We'll take a look at the following products:
RaceDeck vinyl tiles
GarageTrac vinyl tiles
Sherwin-Williams Armorseal Rexthane 1 (a single-part urethane)
Rustoleum PROFESSIONAL Epoxy floor coating (2 part urethane)
Seal-Krete (a waterproofing sealer)
We're comparing 3 very different approaches to the problem of a clean garage floor. So, I'll address them one at a time.
For purposes of this comparison, we'll be considering the proposed 28'x40' garage floor. Assuming it's an unobstructed rectangle and those are the exterior foundation dimensions, we're talking roughly 1100 square feet. It might be slightly less than that, but there's likely a little wasted material, so we'll just go with 1100 as a round number.
RaceDeck and Garage Trac are essentially identical products. They're 12 inch square vinyl tiles that snap together. They're made by the same company. From what I've read, the RaceDeck is the premium version - nicer gloss and nicer detail in the patterns on the top of the tile.
The main pluses for both are ease of installation and a visual presentation that can't be beat. Also, there are no smelly/dangerous chemicals involved in the installation.
As far as the visuals - if you want a garage that impresses your friends, this is what you want. Period. Picture a "man cave" with a couple of very nicely restored cars on display. Then, as you walk by admiring the cars as they sit on this spectacular looking floor, you make your way over to some oversized couches, a huge TV with surround-sound, and a fully stocked mini-kitchen. The only down side will be getting your friends to leave at the end of the evening.
Prep work is simple - clean the floor. Sweep it, pressure wash it, whatever you think it needs. Then start snapping the tiles together. If you pressure wash the floor, you might want to wait until the next day to lay the tile. Otherwise, this looks like a job that could be done in a single day. If the floor is stained - but not smelly - this will fix you up much more quickly than any paint or sealer.
How does it hold up to what level of repair work? It depends. If you're doing light duty cleaning and minor maintenance, it should be no problem at all. If you're doing heavier work with floor jacks and jack stands, you might need some sheets of plywood under them. If you spill nasty stuff, vinyl should clean up with detergent or mineral spirits. I don't know if oil, antifreeze, etc. will seep between through the joints where the tiles snap together. That might be a problem.
The main limiting factor is cost. From my earlier research:
GarageTrac® 48 Pack Garage Flooring – DIY Garage Floor Tiles lists GarageTrac at $2.54 per sq. ft.
Shop RaceDeck - RaceDeck Garage Floors lists their standard tiles at $3.40 per sq. ft.
So, for my 1100 square foot floor, we're talking $2794 for GarageTrac and $3740 for RaceDeck. In comparison, a 5 gallon bucket of SealKrete Satin Concrete Sealer #604005 will do 750-1500 square feet (depending on surface smoothness and porosity) for $122 at Home Depot. But, a) there's much more prep work to do, and b) I'm getting ahead of myself.
As we take a look at the sealers and paints, it's important to remember - there are water and solvent-based products, and there are one-part and two-part products. This is very important, because if you go back later to coat it again in a few years, the different types are not compatible (will react or won't stick to each other). Beware...
So, next up is the Seal-Krete. Stay tuned...