I checked many but not all between now and Dec 15, on both PR website and ExpertFlyer I'm only seeing 343s.
For PR 101:
On Oct 20, both EF (34E) & PR (340-300) show only rows 1 & 2
On Dec 15 both EF (344) & PR (340-300) show rows 1 - 7 (but there is no row 5, so 36 seats).
The 333 has rows 1 - 7 (including row 5, so 42 seats)