What's the difference between Pokemon Red Rescue Team and Blue Rescue Team?

Well the title explains it all, but mainly all I need to know is if there's any different starters and is there certain Pokemon you can only catch in Pokemon Blue Rescue Team that you can't in red and vise-versa. Thank you so much for your help<3 It's really appreciated!
Update: I already knew that it was for separate systems but thanks anyways
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