Sr5 is the more economy-oriented version, while the gts is peppier. If you want to make it fast, save yourself the trouble and get a gts as you'll end up swapping for a new motor anyways (most likely a 4age out of a gts).
Bottom line, if you want a reliable daily driver, go for the sr5 you found. If you want to build up a nice relatively quick car, you'll likely want to wait and find a gts.
Bottom line, if you want a reliable daily driver, go for the sr5 you found. If you want to build up a nice relatively quick car, you'll likely want to wait and find a gts.