This may come as a shock to some USN H-60 guys who bemoan the 60's comm suite, but the MEU would often ask to use a USN H-60 as their C&C bird because of a better comm suite. Also, the ISR capability of the H-60S with the MTS has more utility than the H-1's sensor. The MEU loved the fact that the H-60 could use ROVER to send live video back to the LFOC. Finally, the grunts think that the H-60 is a far better platform to insert from. Apparently the ergonomics of roping from an H-1Y are something of a nightmare while the H-60 is very user friendly.
Huey has 3 radios and (satcom supposedly). H-1 has a more capable sensor with ROVER coming in the near future. Have heard nothing but good things about the HIE capabilities of the Huey. Also, the UH-1Y has a WAY better cockpit than the -60 IMHO.
I think the Marine Corps should have gone with the -60 just because it seems like Sikorsky actually gives a shit about putting out a good product. I'm sure they would have accommodated whatever HQMC asked for.