I think both colors would be lovely but the lavender will probably be harder to come by. I've not seen many lavender WOCs, but then I'm only a little over a year into my Chanel obsession.
I have two red bags in general, and they both get a ton of use. It's the perfect 'pop of color' color, of that makes sense
RED all the way! No doubt for me- I own Red chevron WOC, and Mini, I use them a lot and easy to match, they're really nice pop of color.
I'm even thinking of getting next bag in Red again
Even if you get lavender, I think you would hope to have 1 red in your collection eventually IMHO...Good luck with your decision!
It depends on your wardrobe. If you tend to wear more neutral tones, then red would be a nice pop of color. If you wear more pastel or cool colored tones then lavender might pair better.