Ok, so this is by no means biased. I have a pair of dive r innegras (medium) and my dive buddy uses the c4. Now the c4 if soft but it's a wall compared to the innegras. The innegra are amazing but not where current is concerned. The blade is generally soft as hell! The medium is softer than most soft blades. Now this isn't all bad. When there's no current, on deeper dives, this thing is nothing short of amazing. Soft is really nice for sneaking up on fish as well where spearfishing is concerned. However, if there's the slightest current or you need an extra little kick to get a fish in range? It's a little useless. If I were you, I'd look at the conditions, if they permit, get the innegra. If they're a little tougher, whilst the c4 is soft, it works better. Btw, why go c4 at all when u can go moana? I still prefer the innegra over everything when it's flat, but the Moana is a really really good tough water blade.
Blessings from Trinidad and Tobago.
I'd rather dive than breathe
Island born, ocean bound.