As someone told before, snug fit is important for wetsuit, you will find the part that is loosen, later on you can feel the cold water moving there while you are diving, it means thermo protect is almost absent for that part.
So snug fit. No matter which brand you are going to choose, without this, it's not going to work well for you.
If you get a tailor made, of course it will fit better, but let's say you just want to buy one at LDS. Then sometimes you may not have a choice on which brand you're gonna get. You have experienced it already. Each brand has a different cutting, e.g. you may find that size M of brand A has a longer sleeve, and size M of brand B has the correct length for the sleeve but it's narrower in waist or chest. So, it's good to find some brands you like to begin with, but if it doesn't fit, you need to move on until you find something that will fit.
So snug fit. No matter which brand you are going to choose, without this, it's not going to work well for you.
If you get a tailor made, of course it will fit better, but let's say you just want to buy one at LDS. Then sometimes you may not have a choice on which brand you're gonna get. You have experienced it already. Each brand has a different cutting, e.g. you may find that size M of brand A has a longer sleeve, and size M of brand B has the correct length for the sleeve but it's narrower in waist or chest. So, it's good to find some brands you like to begin with, but if it doesn't fit, you need to move on until you find something that will fit.