My theory - I'm not a lawyer - is that they turned down Mike Kelly's case on Pennsylvania yesterday because they knew the facts and arguments would be brought out and encompassed by this case. That's my hope anyway.
Yes I agree. The Texas case is basically The same premise except it appears to be more succinctly written and with 9 other states enjoined it gives the court a better excuse to hear it. States only have one place to go for relief so the SCOTUS would have a hard time turning them away.
Also in my opinion it would be easier for the court to find 4-5 states guilty of the same conduct and grant a remedy than just Penn. It would carry more weight.
This all happened before Texas even file their lawsuit late Monday night/early Tuesday morning.