These saws are not the same- some people have had good luck with the real cheap ones, and good for them- but I have seen a definite difference in quality between the "same" saws and other tools. I usually only buy Jet, when it comes to cheapo imports. I find the motors are better, the fasteners are better, the electricals are better, and the castings are better. Their little saw has some differences in design as well- the cheapest ones dont even have bearings on the blade guides while the Jet does. But above all else, Jet actually stocks parts, has tech guys who you can talk to on the phone who know what they are talking about, and stands behind their products- I recently had them send me free parts for a Jet tool I bought in 1978. Try that with Hornier or Harbor freight.
Jet has been in business since 1958, and since 82 has been owned by a swiss conglomerate- I just trust em more. The actual dollar amount of difference here is $200 max- and for me, in a working shop, my time is worth enough that not having to rebuild a tool constantly is worth $200 mighty fast.
Grizzly would be my second choice- I think grizzly tools are noticeably inferior to Jet, but they have very good parts and service backup, as opposed to almost every other import, which are basically, we opened the container- our job is done.
But hey, buy the cheapest if you want. Just dont complain when it breaks, and there are no parts available.