Slippage shown on Kwenta "Convert" page is different from what 1inch shows

[drptbl]

Description:
It seems that in some cases slippage is different on Kwenta comparing it to 1inch at the same time. I would expect them to be equal.

Prerequisites:

• any synth in your wallet

Reproduction steps:

1. Go to Kwenta "Convert" page (https://dev.kwenta.io/dashboard/convert)
2. Connect your wallet
3. Select any synth (for example "sXAU") inside "From" drop-down
4. Click on your synth balance to fill maximum amount to swap
5. Notice shown slippage inside "Into" input field
6. Head over to 1inch and use the same pair to see the slippage and compare it to what you've seen on Kwenta

Current behavior:

• slippage is different on Kwenta and 1inch

Expected behavior:

• slippage should be equal on Kwenta and 1inch

Screenshots:
Below you can see that there was 1% difference in slippage between Kwenta and 1inch.

Desktop (please complete the following information):

• OS: macOS Big Sur 11.2.2
• Browser: Chrome 89.0.4389.95

[evgenyboxer]

I'm not sure where they are pulling their price from... but I'm using coingecko, and I guess it's OK to have some difference