No idea. Haven't even seen any official American announcement of these series yet.
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So, all 3 SoR and GA games are on the Sega Genesis Collection game that came out years back. So here, we get better emulation, online play, more achievements / trophies, and... I guess that's everything!
GA III didn't have many english translations before these collections (only on the Sega Channel in the past?), so it's fresher.
But man, WHY NO REVENGE OF DEATH ADDER?!? Why no SORRemake tribute within SOR? You'd think with established, legal ways to already get these games on the same consoles, that they'd do something more to make people who already have these games want to buy them again... "M2 emulation, not Backbone!" doesn't really work to get a mass of people to buy old games again...