I've had so many requests for side by side comparison of BYS Aloha and Collection 2000 BMX Bandit.
So, here it is! Definitely click to see the larger version
Both of these are gorgeous periwinkles. However, to my eye anyway, BYS Aloha is darker and more purple, whilst BMX Bandit is lighter and more 'dusty' looking in appearance.
These differences are pretty marginal though. I'd say that, if you can't get your hands on BYS Aloha, then definitely try BMX Bandit as an alternative.
If you have a periwinkle that looks similar, paste the link to your post in the comments. Let's have a Periwinkle Polish Party!