Found this looking for other info entirely and I am honestly just sad at all these people directing someone away from really good bodies to the most basic crap just because it's "easier".
I really hope you didn't already go shopping. Being the easiest to buy clothing for is not a good endorsement of any body; if you like the look of Legacy and Jake, you're going to be very disappointed with Gianni. If your primary concern is finding clothes, then go ahead and go Signature, but if you have more attention to detail than that, make one of your original choices. Both bodies are fantastic- Jake is my favorite for many aesthetic reasons and is less expensive, but suffers waiting for updates and is not even technically fully BOM. Legacy is probably your best choice based on a balance of fine detail and active creators, if you don't mind the price tag. Legacy male bodies are well supported and constantly gaining more.