Sailor, where's feedback ?

Got this Sailor Pro Gear Realo, medium nib. It's surprisingly silky-smooth.

I have 3 Sailor PG standard (Medium and Medium-Fine), and they, despite being smooth writers, have distinct feedback. I thought Realo has exactly the same nib as PG standard . But it feels more smooth, like it is extra polished. Or it is ink contributing to it?

I ordered Sailor Manyo Kuzu specifically for this pen, and the package arrived the same day. It is perfect match, although Yama-budo and Writer's Blood or Oxblood would work too.

https://preview.redd.it/qu26ksvg7ohe1.jpg?width=1536&format=pjpg&auto=webp&s=b1f5140690b92da270a153583415b337ff83d91f

https://preview.redd.it/84f2wobi7ohe1.jpg?width=2048&format=pjpg&auto=webp&s=1ed0e7494fba686f6c535cb8646ad0e66010ce06

https://preview.redd.it/762ugm9j7ohe1.jpg?width=2048&format=pjpg&auto=webp&s=bc92771fbada52a6dfb19ab8efa2505570dc67ae