Yes. To date it's still the smartwatch with the best price/performance ratio
Yes, see above.
Beauty is in the eye of the beholder.
The PT is a sporty watch (square, plastic), the PTS has a more "classic" approach (stainless steel, but still square). Otherwise, see above.
P.S.: GBP 49.99 sounds like Amazon: Just order & try it, if you don't like it, return it.