So with that in mind, the group is aiming to get to the bottom of why the consumer price jump from 16GB to 32GB models of top tablets is so steep, it could almost be classed as vertical.
Just as we noted heavily in our in-depth iPad Air review, Which? points out that the 32GB iPad mini is £80 dearer than the 16GB model, while Google asks for £70 more for the storage bump on the Nexus 10.
While Which? conducts its probe, the group is advising potential tablet shoppers to opt for models where they can boost storage themselves through much-cheaper microSD slots.
"With tablets in demand this Christmas, buyers will be shocked to discover what a raw deal they're getting on built-in memory," Which? editor Richard Headland told The Inquirer website.
"If you want the best value storage, then buy a tablet with a SD or microSD slot and add a memory card for a fraction of the cost."
We've long pushed this point of external storage being cheaper to buy than upgrading an internal capacity - if the campaign shows that those extra GB are coming at too high a premium, then everyone could save some cash.
We can't imagine the tech giants being too forthcoming on this front, because you know, it's Apple, Google and Samsung and they like money a lot, but we wish Which? well in its endeavours as the disproportionate cost of higher storage models has ticked tech fans off for long enough.
Sign up for Black Friday email alerts!
Get the hottest deals available in your inbox plus news, reviews, opinion, analysis and more from the TechRadar team.
A technology journalist, writer and videographer of many magazines and websites including T3, Gadget Magazine and TechRadar.com. He specializes in applications for smartphones, tablets and handheld devices, with bylines also at The Guardian, WIRED, Trusted Reviews and Wareable. Chris is also the podcast host for The Liverpool Way. As well as tech and football, Chris is a pop-punk fan and enjoys the art of wrasslin'.