The Ryker was objectively a lot of fun. More fun a $12-16k motorcycle? Not for me but other may choose differently. If you were motorcycle curious but did not want to go straight to two wheels, had an injury, poor sense of balance. I suppose it might be marginally safer than bike since it is unlikely to be laid down but the cornering limits are definitely lower. I certainly would not make fun of someone for choosing one.
The Spyder is a big comfy tourer. I can definitely see someone transitioning to one after big cruiser bike. Especially if they want to take a spouse. Its a more open than a convertible but less than most bikes. Probably like a fun dress Gold Wing that you can't tip over. Depends on your use case. What I did find was the Spyder was a bit over complicated for my taste with the weird start up process - turn key, accept warning on screen, blip throttle the wrong way, hold brake, press start button. We never did figure out how to get into reverse despite googling it. The turn signals were buried in a mess of buttons. Its probably fine if you own one.
Neither is for me but it was a blast to give it a try.