There will always be a violin that sounds better. Even if you scrape and get the more expensive one, you may find one you like better a month later at a different shop. However, if you get the cheaper model, the one you like will be gone when you go to upgrade because violins with good sound are almost always sold a month after you encounter them if not sooner. Spend what you can afford at a shop with a vast selection so when the day comes when you hear another gem and you have more money, you can jump on it.
What models were you looking at and what were the prices?