Edit, have to revise this as the eracing labs is not us $2k, the figure I took from basic eracinglabs cost. it is $2350 including the thanos. So given the SRT has a cabinet they are very similar in cost.
As they all have the same software options, they are the same controllers, servos etc there are just slight variations on the looks. They will both perform the same.
The SRT does however have all the electronics in a cabinet so thats worth something. A con would be it comes with the 4 actuator thanos controller where the eracing comes with 7 if you want to add something laterllike surge/tl or a seatbelt later.
One is in China, another in europe so shipping could be a big factor as well depending where you live.
Personally I would be happy going with either depending which made sense pricewise for tax/shipping etc. (caveat for me, I would be using 5 ports on a thanos not 4 so the SRT would be an issue for me personally. but if you dont need that...)