Bro, I was making the same decision between the two cars 2 months ago. And my decision was EG!!!!! And NO REGRETS!
Actually the conversion cost of both cars are similar, should be around 10k for everything (assuming Mivec 1.6 for Satria, B16A for EG).
Car Year: 1997(Satria) 1992(EG)
Car Price: 13k(Satria) 18k(EG)
As you can see, the main difference is the price of the car and age of the car. Satria is way cheaper and newer but I will still go for Honda (but find a well maintained one la!)
1 more problem you might need to consider is the loan amount on both cars, you will need to put up more downpayment for EG since it's older! As for satria, I think you can get full loan, and get cash back somemore depends on the seller.
Well, good luck! Go for EG if possible! EG is evergreen! If do conversion properly it can be a better car than the NEW CIVIC! Faster!! HAHAHA!