No, Windows NT until 4.0 had the same interface design as Windows 3.x (although there existed a semi-official SP/addon to give NT 3.5 the Chicago interface, making it quite similar to 95), and NT 4.0 came later than 95

Both OS lines were developed concurrently up until XP release where DOS-based 9x was abandoned and NT became the basis for every subsequent product. Plus of course there's that whole part of the story where MS teamed up with IBM and worked on OS/2.

NT got new 9x shell with 4.0 release but a beta package could be installed on 3.51 as well - tho, that could render some compatibility issues.