Question about Philips OneBlade Pro

Not exactly easy with the info here at Galaxus.... But I would think that with the QP6620/30 you get an additional blade with the body attachment (this green protective edge). Because you get one more blade than with the QP6520, the price-performance ratio is probably a bit better. I have personally tried the body attachment and find it a bit superfluous. Of course, you cut your skin less quickly. But that's also possible with the classic blade. Otherwise, I can really recommend it.