Ainsworth built at least six variations of their Mustang Money slot over the years. They share the same western theme, similar symbols, and generally the same 5x3 reel layout. But the differences in paylines, RTP, volatility, and bonus mechanics make some versions clearly better than others.
I've played all of them and tracked the numbers. Here's what separates each one and which I'd actually choose to sit down with.
Full Comparison Table
| Version | Year | RTP | Volatility | Paylines | Max Bet | Key Feature |
|---|---|---|---|---|---|---|
| Original | 2013 | 94.38% | High | 100 | $10,000 | Gold coin multipliers (up to 10x) |
| Mustang Money 2 | 2013 | 94.07% | Medium | 20 | $500 | Expanding sticky wilds on reels 1 and 5 |
| Mustang Money Super | ~2015 | 94.75% | Medium | 100 | 100 credits | Dual free spins (Standard + Super) |
| Mustang Money Energized | ~2017 | 94.38% | High | 100 | $10,000 | Same as Original with tweaked math model |
| Mustang Money 2 Energized | ~2018 | 94.09% | Medium | 20 | $500 | MM2 with modified feature frequency |
| Mustang Money RR | ~2019 | ~94.3% | High | 100 | Varies | Reel Respins added to base game |
Breakdown by Version
Mustang Money Original
The one that started it all. 100 adjustable paylines, high volatility, $10,000 max bet. The gold coin multiplier system during free spins can combine for up to 10x on a single win. This remains the version with the highest theoretical ceiling, even if you'll rarely reach it.
Best for: High rollers who want maximum possible upside and can stomach long dry spells. Full review here.
Mustang Money 2
Dropped to 20 paylines and medium volatility. Replaced coin multipliers with expanding sticky wilds on the outer reels during free spins. When both reels 1 and 5 show Mustang Money tiles, they expand into full wild columns and lock. Looks spectacular when it fires. The problem is it rarely does.
Best for: Players who want the Mustang Money theme but shorter, more predictable sessions. Full review.
Mustang Money Super
The best version on paper. Highest RTP at 94.75%, 100 paylines, and two different free spins modes. Standard mode uses the reel 2/4 multiplier system from the original. Super mode puts multiplier mustangs on reel 3 instead, with up to 3x per hit. More variety, better math.
Best for: Most players. Offers the best balance of RTP, feature variety, and payline count. Full review.
Mustang Money Energized
Nearly identical to the original. Same 94.38% RTP, same 100 paylines, same high volatility. Ainsworth adjusted the internal math model slightly, which may affect bonus frequency and average bonus payout, but the published specs are indistinguishable from the original.
Best for: If you can't find the original at your casino, this is essentially the same game.
Mustang Money 2 Energized
Same relationship to MM2 as Energized has to the original. 94.09% RTP (marginally better than MM2's 94.07%), same 20 paylines, same sticky wild mechanic. The differences are in the underlying math model, not the visible gameplay.
Best for: If MM2 Energized is available but regular MM2 isn't. Otherwise, no strong reason to seek this out.
Mustang Money RR
RR stands for Reel Respins. This version adds a respin mechanic to the base game that the other versions lack. When certain conditions are met during a base game spin, individual reels can respin for a second chance at forming winning combinations. The rest of the game follows the original template with 100 paylines and high volatility.
Best for: Players who want extra base game action. The respin mechanic gives the base game more variety at the cost of slightly adjusted payout distribution.
My Rankings
If I had to rank them by overall quality:
For detailed RTP analysis, see the dedicated page. For free spins mechanics across all versions, check the free spins guide.