That is a significant difference and the reason why slots with the best RTP can be found at online casinos. Land-based slots can therefore have RTP's as low as 75%, compared to 95-96% on average online. Overheads at bricks and mortar establishments are much higher, so physical casinos need to recoup their costs.
The good news for players who prefer to gamble online is the highest RTP slots values can be found there.
