What a great resource that comparator is, many thanks. It would be awesome to see that technology in the future used for other comparisons such as slot 2 cards, or passmes/nopasses, a bit like Qrayzie's existing PDF chart linked from
http://gbatemp.net/index.php?showtopic=33429
A couple of things:
1, In the 'Physical dimensions' row, all the entries say 'Same as original DS cart' so there's nothing to really compare there. Maybe it would be best to use this row to look more closely at the issue - for example some cards have a bulge under the label where one of the chips sticks out. By mentioning those issues that row would then become useful.
2, In 'NDS homebrew compatibility' it might be good to change the DSLink's entry to 'Not great originally, but DLDI fixes it' to match the other entries.
3, What does the 'Uses loader or firmware' row mean? I always thought that, in the context of these devices, loader and firmware meant the same thing.
4, I agree with one of the above posters that the use of ticks and crosses is a little strange in some rows. Specifically, the 'Flashed DS required' and 'Splash screen' rows have nice green ticks where actually the red crosses are preferable, so maybe you could negate the row headings (e.g. 'Doesn't require flashed DS', 'Doesn't suffer from a splash screen').
5, Similarly, the row 'Connection to computer' doesn't really need ticks and crosses at all as neither is really 'better' than the other - it could just say 'via Onbard miniUSB port USB2' or 'via removable media' as appropriate.
6, Again similarly, the rows 'Built-in memory' and 'Removable media' rather than having ticks and crosses making it look like one method is preferable to another could just be combined into one row called something like 'Memory type' saying either '512 megabytes built-in memory' or 'MicroSD/Transflash'. You could also use this row to say the max size of SD card if appropriate.
7, It would be nice to see in the table which cards are side or top-loading for the removable media (with 'N/A' for DS-Xtreme). Again I would suggest that you don't put a tick or cross on this, as some people prefer side-loading (to protect the card) and some prefer top-loading (if they frequently change roms).
8, It would also be nice to see in the table which cards have spring-loaded or non-spring-loaded slots. For this row I guess you
could use ticks and crosses as I think it's pretty unanimous that spring-loaded is better (although I suppose it's one more thing that could break).
Hope you don't mind all these suggestions!