Hi, so basically CS is already a professional degree, it is really good that you are thinking of taking the best course to supplement it. But neither Bcom or Bcom honours have any relevance with Computer Science however  you can definitely pursue a course to have an extra skill.

Since, BCOM (HONS) is above BCOM (Pass/General), it is in the best interest that you choose BCOM (HONS).

It may require a bit of greater hardwork than BCOM(PASS) but that extra bit is worth the sacrifice and it also gives you a better knowledge and respect than the other.

So you should go for BCOM (HONS) and CS.

Hope this is helpful