Bass Thunder, Why do you like the .175 better than the .165. I'm thinking about trying that guage.
I can't say I like .175 vs. .165 gauge straight up because I don't know of any string maker that offers both to test apples with apples. If anyone knows of one, please inform me.
That being said, I do like the Warwicks better than the SIT Power Steels for a couple of subjective and objective reasons:
As has been previously stated, higher gauge and longer string length makes for higher tension. Also as a set, they come with a .135 B string (I think a .110 E ??) and makes for a balanced set to my fingers. I like higher tension on lower strings for sure. To me, higher tension = more articulate at these frequencies. I have not tried .185's yet. I'm happy with the playability of the .175 for now.
The SIT's are designed for 34" scale, but the outer wrap just fits past the nut (actually zero fret/nut in my case).
The SIT's are exposed core and the Warwicks can best be described as a fat hybrid taper core (a standard B string with one more wrap to top it off). Exposed core can have some harmonic artifacts with the overtones (some call it "chorus-ing" - too much overtone, not enough fundamental) and that can be a negative to some, positive to others, non issue to others.
You can order the Warwick .175 as a single string through your RETAILER ONLY from Dana B Goods (Warwick's US wholesale distributor located in beautiful Ventura, CA).
Photo from left to right - Warwick .175 / SIT .165 exposed core / Rotosound .130 / Pedulla .128 taper core
Good Luck.