Theoretically, I find that - as you called it - "baggy" thongs, like the ones in the photos above, are better at accentuating and enhancing a woman’s curves, while also being a compromise between attractiveness and comfort touch. More space also gives designers more room to mix styles and use of materials. And from our specific perspective, which is why we're on this forum, it's easier to see VTL or see-through🤪 Meanwhile, strappy thongs in general lean heavily toward attractiveness, minimal coverage combined with a feeling of lightness, as if there's nothing underneath. Aaand due to its size, it is easier to spot an undeniable whaletail peeking out from under jeans or other kind of pants.
This is just my personal theory from male perspective but it would be extremely interesting to confront it with opinions of other female users here on the forum.
I don't see anything wrong with wearing one or another. From a content creation perspective, mixing it should be a good thing🤷♂️