compared to除了比喻之外还有 与...相比的意思,翻译成中文就是“比得上”
像你那一句里面,就是新手的画比不上专家的.有“比得上”的意思
compared with是单纯的比较.新手的画完全可以拿来和专家的比较啊,compared with并没有“比得上”的含义.
如果要用compared with的话,应该是类似于：
Compared with those of an expert,paintings of a beginner seem not professional enough.