请教又爹又妈：那个violin好？

儿子7年级，take orchestra and privateiolin lesson第二年，因为每天从学校拿琴回家很不方便，想再买一把放家里。Amazon Mendini 4/4 violin有两种，有区别吗？ 还是应该买把更好点的？

Mendini 4/4 MV400
http://www.amazon.com/Mendini-Fitted-Violin-Shoulder-Strings/dp/B0020288RI/ref=sr_1_39?s=musical-instruments&ie=UTF8&qid=1408975670&sr=1-39&keywords=violin+4+4

Mendini 4/4 MV650
http://www.amazon.com/Mendini-Fitted-Flamed-1-Piece-Violin/dp/B0020288LO/ref=sr_1_9?s=musical-instruments&ie=UTF8&qid=1408976457&sr=1-9&keywords=violin+4+4