Lori. The answer is yes, these are the same people. You can follow their census entries 1850 at Levant, 1860&70&80 at Biddeford.
The 1850 census entry is potentially confusing/ Catherine's age is difficult to read, but I think should be read as 19 (30,41,51 in later years/ Samuel listed as Henry - suspect he was Samuel Henry, though sometimes listed as Samuel F.
Samuel remarries (to Sarah WOOD/CLAY) in 1894 and this couple is on 1900 census at Biddeford
I have not been able to trace anything more on Samuel's parents, other than what is stated on the death record - which may of course not be correct!
If you have anything that would help connect them to other TIBBETTS families please let me know. Ian