Was the WC a GP100 or a SP101? They come in both. If it was the GP100, a Match Champion is going to be pretty same-same other than barrel length. The OEM grip on the MC is not going to be conducive to concealment of any sort, but as mentioned compact grips are available. You can get them through Ruger shop or Altamont.
The only revolver I ever AIWB carry is an LCR, so I'm not much help there.