(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
The DNA strands of these fraternal twins look awfully similar, but somehow still differ just a little bit. Can you spot the differences in this Consecutive Clones Sudoku?

PDF

or solve online (using SudokuPad)

Theme: Fraternal Twins

Author/Opus: This is the 188th puzzle from clover!, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Sudoku rules (insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region). Additionally, for each shaded, connected shape (“clone”) in the grid, numbers in the same position must differ by exactly 1 (i.e., be consecutive). (For instance, if R9C5 contains an 8, then R5C9 contains a 7 or 9.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:00; One party hat (🥳): 11:00. All other solvers earn a 🦕: dizygotic Dilong.

Thomas Hits the GAS (highlight to view): 2:11, with SudokuPad replay file shared as a download for now (requires loading via settings menu with improvements expected before people should use this regularly).

Solution: PDF

Note: Follow this link for other less common variations of Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.