I used to work for a PV installer. I really could not see the difference in modules, except for looks i.e. all black, no silver.
Apart from damage, I have also not heard of a module failing. So discard the sales hype, go for the cheapest.
This is also true from the different 'chemistries', there may well be a marginal improvement at certain light levels, but like a Porche on the M25, it is rare that you actually benefit from it. No matter the size, performance or price of a module, it will generate very little when it is a dark winters day.