Each do various products better.......
Below is IMO......
Bull bar - ARB hands down, do the best bar on the market.
Lights - Much for muchness, most dealers stock the same or similar lights.
Tow pack - Most deal Hayman Reece which is the way to go.
Dual battery - ARB and TJM have similar products but I have the Piranaha DBS180S, I'm running two of these to enable a 3 stage system to charge trailer batteries.
Snorkel - Most will run Safari and I personally prefer the Safari in many ways....
Roof rack and bars - Not a fan of the ARB version though I got mine through a TJM store which is the Tradesman Oval Alloy which is fantastic.
Radio UHF - All will run similar models
Long range petrol tank - Petty sure both run Longranger tanks.
So with this in mine, shop around and see which one will give you the best deal for bulk purchase. You will be surprised what you can get. We basically got our $1100 roof rack for free when we did a $14k fit out......