Those are great, Noem, thanks!
The most intriguing thing (although not at all surprising) about the first site is the degree of variation within each group. Some of it can be explained by looking at the background info (people who have spent at least a year in an English-speaking country will generally have picked up the consonant/vowel sounds absent from their native language, for instance), but much of it is just individual variation. (Due to different teachers, experiences, ease with learning languages? Probably all these and more.)
Fascinating!