A while back, I reviewed Sheaffer Skrip Red in cartridge form. It was a lovely, dark cranberry red color that I immediately fell in love with. Some people commented that is looked much darker than their bottle Red and I said I'd order a bottle and see if I found a difference Sorry it's taken so long to get to it, been busy at work. I was also waiting to use up the cart and, then, without thinking, I just rinsed and refilled the cart with the bottle ink - d'oh! So, no side-by-side.
The bottle ink is, indeed, bright red, quite different compared to the cartridge color. This is undoubtedly the color people think of when they see the words "Skrip Red".
On good paper (BnR), it looks good - bright color, nice defined line, no show- or bleed-, doesn't look quite as 'flat' when it dries and the cart does; unfortunately, the is very little shading, unlike the cart. On cheap copy, however, it's not quite as well-behaved - while the color is good, show- and bleed- is on a par with Skrip Turquoise (bad) and the line is definitely thicker, though I wouldn't call it feather-y per se.
Of the two, the dark cranberry color of the cartridge is the definite winner for me and I'm hoping that the pack I got isn't just a one-off batch variation and that future cartridges will be the same color. But if you're looking for a nice, bright 'red' red, Skrip bottle Red is a good choice.