Is your gsr190 the two pup pj configuration or the single humbucker pup version? If the former, not gonna get big change. Though pup upgrade would improve the ibby. If the latter, abigger change due to diff pups voice char but more versatile (2 instead of 1) with the squire. To me you making more of a sideways rather then forward step with the change. Thats not a bad thing. But I wouldnt be surprised if you found the change wasnt as much as you where hoping. However, if you like the squires neck better, then the change is good. Keeping in mind that pup change for either is viable upgrade as is hardware upgrade for the squire. Youd of made a more forward step with changeing from the ibby you have if youd gone with something like the Ibanez SR300 instead imo.