BitVM = computer on-chain and off-chain use Taproot natively = good for create complex multisig and potential trustless sidechains

RGB = computer on Bitcoin use Client Side Validation and AluVM = compatible with DLCs and HTLCs for DEX, stablecoins backed by Bitcoin.

Finally a real discussion topic on SN, how refreshing. I don't know enough about RGB to answer your question, but you can check this website. https://www.rgbfaq.com/