Hi Totallyramdomvic, from what I know about the carbies, both will run no problem on the Victa Rotomo, there may be a couple benefits from using the Victa special carby instead of the Rotomo Clip carby but it really doesn't matter.
The only problem is if you use the earlier Victa Brass Nut Carby, which was known to heat off and fall off (or something along those lines) but even then if your only running it for a short amount of time for fun it doesn't really matter.
Thanks for recommending me Chris86

Very happy to help!