Well, it seems it is your lucky day...!
I've never tried Corelli 370M, but right now I'm trying Corelli 370TX..I guess it is not very different..
I'm going to compare Velvet 180suit with Corelli 370tx..
..maybe Compas180suit -in orchestra tuning- have lower tension compared to 370tx..
They are a little thicker than 370tx, so, as 370tx are -probably- the thickest strings of Corelli, I easily guess that 180suit are thicker than 370m..
The arco response in Compas180suit is very smooth and they bow wonderfully...no scratches at all..the vibration starts as you touch the string..you don't need pressure to get a good sound.. The sound is warm and not bright, even if harmonics are wonderful.. Maybe it is not a very precise and brilliant string (as spiro are..). They have more a warm sound..
Velvet says this is a string for ArcoPlayer..!
The pizz is good too! it is darker than corelli and more gut-like (and less "spiro-like"), but this not gut.. I think they have a silk-core.. The sustain is good (not as long as spirocores.. but still good..)
If you'll try them, remember to have an action on your bass that allows them to vibrate..as this is a low tension string and the vibration of the strings is wide, the strings need some "space".. It doesn't mean you'll need to have the G at 12mm..!!!! I think 9-10 mm would be good.. but, you know, it depends on your bass..
Hope this helps...
Have fun with 180suit, and pay attention to the mounting instructions..
For any problem with this string (for instance breakages..), contact Velvet customer service. They are really very kind.
They quickly replaced me an E I got broken.