The whole handheld gaming market is pretty small. There’s the Switch which outsold the last couple gens of Xboxes and PlayStations. Good luck beating that. Besides that you have smartphones which just about everyone owns and only a handful of brands being especially popular. Then you have dedicated Android having handhelds and handheld emulation machines which are extremely niche.

So either you’re looking at extremely popular and widely owned handheld devices with extensive histories and customer loyalty or extremely niche devices. Not really a great comparison.