Please tell me, are solf or flexable dentures a better way to go?

Not really: See a prosthodontist for an evaluation. They are the experts. The flexible prostheses rely in many ways on tissue support and not strong support from the remaining teeth. This leads to increased and uncontrolled force being placed on the tissues and underlying bone. This leads to accelerated bone loss. Do yourself a service and see the expert. Good luck.

No: The only type of "flexible" dentures are for partial dentures and while they are bendable and flexible, traditional rigid dentures are usually best for full denture cases.

Of course: This type of denture looks better because no clasps are visible.