Fuji discontinued the TSVSG guides and I was wondering If the K series TISICS would be a replacment for them. The difference in the guides looks like the double brace coming upto the ring on the K series has a flare outwards vs the tsvsg is straight.

If you mean the TKW's ,The ring is also tilted forward. Most people would use the KW's to replace the SV's and the discontinued HV's

TKWSG Titanium SiC Double-Foot Spin/Cast K-Series Guides, these are the ones I am thinking about using to replace the tsvsg. Do you know what the differences are between the two?

There are significant height differences in the larger guides.

The KW's have sweeping leg frames and a tilted ring. this is the Fuji anti tangle design. the KW's are also higher framed in general vs the SV's.