What would a Wiki look like? Thousands of paragraphs, one per meter? Or pasted copies of datasheets, most of which are multiple pages? Which meters should be included, only those with validated CAT ratings? Prove it!
Do we keep data for meters no longer in production? How about analog meters? Yes, what about my Simpson 260s?
Although there are hundreds of meters in current production, only about a dozen or so come up in the Test Equipment forum. Some very low end, some middle of the road and some high end. Beyond the forum, there is always Google. All of human knowledge is on Google.
Actually, the parametric table makes a certain amount of sense. If you need a feature and the meter doesn't offer it, it's pretty easy to see. If you are paying for features you don't want (or could be considered patently unsafe, like transistor sockets), you can see right away. What you can't tell is whether the safety rating can be considered credible (Fluke and a few other high end brands) or dubious. And that starts another unending argument.
No, I imagine you will have to do your own homework and make your own choices. Use the spreadsheet, or don't. Search the Test Equipment forum or just ask. Somebody will have an opinion. Then all you have to do is consider the sources. Where are they coming from? Many consider the CAT rating (when credible) to be the be-all, end-all, of multimeter selection. Since I only work on low voltages and low energy with most of my meters, I simply don't care. I have other tools for mains work and it doesn't usually involve a DMM.
I'm not sure a Wiki is the right format.