I believe the TS4 has the ceramic composite and tungsten forged inside as well so they likely have a slightly different feel.I cant personally speak on the TS4 as I've never hit them but I imagine they would feel alot like my TS3's but possibly more "solid" due to the fact that they have no cavity or extra perimeter weights. Soft yet responsive feel so a really good club for a better player or someone looking to do a combo set in the lower irons like 8 or 9-wedge.
The TS1-IM I have tested against the TS3, STi2 G2, & KE4 Max all with the same loft/lie/shaft. the TS1-IM felt almost identical to a TM P790 but softer. The face is very responsive and fast feeling. In my experience the TS1-IM provided a lower flight and spin then the irons it was tested against. If you are looking for a hollow body foam filled iron with a forged feel I would 100% recommend it. Also as mention above I do have a 7i head I can sell on the cheap that was only hit indoor for testing.




