here's a small comparison of the gold prices in EU between Armored Warfare and World of Tanks. Armored Warfare allowed the players to buy gold for the first time on Monday. Like in World of Warships, any gold purchases in Early Access (= closed beta) will be resetted (returned to players) when the open beta starts.
The prices of gold bundles are the following:
1100 € 4.99
1650 € 6.99
2750 € 11.29
5500 € 21.99
16500 € 62.49
27500 € 99.99
In World of Tanks, 1 month of premium costs 2500 gold which is exactly 10 Euro. In Armored Warfare, it costs 2300 gold - when using the middle (2750 gold) bundle for calculation of gold-per-Euro basis, the price of monthly premium comes out slightly lower (9.44 EUR or around that). But the biggest difference is the highest tier premium tank (tier 6) that earns more than 50 percent extra credits (on tier 6 it is 80 percent, putting it on par with WoT's tier 8), which costs about 16 Euro while the WoT's go for 40-50 Euro (AW devs did confirm that there might be tier 8 premiums as well with even bigger income but so far there aren't any planned).
According to AW sources, these prices however are preliminary and might go further down a bit. If you are interested in more detailed breakdown, Armored Talk blog offers a nice analysis of what costs what.