I have both the wrap around and slip on from Hogue. The wrap around (with screws) is amazing. Perfect fit, feels great. The slip on I had on my Hi Power and it felt similar but didn't look as nice. Also, after a day of IDPA or whatever, the grip would rotate a little. No biggie, but you know. Replaced that one with a wraparound.
I don't think the slip on will work on a 1911 due to the grip safety...
You may be able to trim that part, but I would think it would make the grip less stable.
Best,
Coop