Tonal difference between 浪费 and 糟蹋 Both 浪费 and 糟蹋 mean "to waste." (I'm not really concerned with the other uses of 糟蹋 right now.)

I've seen the collocations 糟蹋粮食 and 糟蹋人才, and 浪费 is very common in phrases like 浪费时间 and 浪费水.

Are there situations where both 浪费 and 糟蹋 are acceptable? Are they only applied to different types of things? Is there a tonal difference between the two words? (糟蹋 seems stronger, but 浪费粮食 and 浪费人才 also sound OK to me.)
糟蹋比浪费的语气更强烈。人们觉得很珍贵的物品被损坏或不被爱惜的使用了，通常是用糟蹋，而不会用浪费来形容。粮食可被浪费，可被糟蹋；人才可能被糟蹋，无法被浪费。

浪费：较为便宜的物品被损坏或不被爱惜的使用了，说话者觉得可惜但不心痛，会使用浪费这个词。
糟蹋：很贵重的物品被损坏或不被爱惜的使用了，说话者有心痛的情绪，才会使用糟蹋这个词。

糟蹋 has a stronger tone than 浪费. When people feel a valuable object is being damaged or is not being used with care, one would usually use 糟蹋, and not 浪费. 粮食 can be 浪费 or 糟蹋; 人才 could be 糟蹋, but is unable to be 浪费.

浪费: use when a relatively inexpensive object is being damaged or used without care, when the speaker feels it's a waste but not in a painful way.
糟蹋: use when a very valuable object is being damaged or used without care, or when the speaker feels pained.