What differs between versions
- Row options. Some offer eight to sixteen, others a fixed count.
- Risk settings. Usually three levels, with different exact multipliers.
- Published RTP. The spread runs from about 97% to 99% — meaningful over many rounds.
- Fairness data. Some publish seed pairs for verification;
others rely on licence and testing certificates.
What does not differ
The distribution. Every implementation puts the common outcomes in the centre and the rare ones
at the edges, because that follows from the shape of the board rather than from any design
decision. The probabilities are identical everywhere for a given row
count.
Choosing between them. Compare published RTP first, then whether fairness
data is available, then whether the row and risk options suit you. Presentation is the least
important difference and the most heavily marketed one.