からして・さえ: the difference
からしてN2
Meaning
Even..., Judging from, Based on
Past papers
Tested 2 times in past papers
Example
このスープは匂いからして美味しそうだ。
Judging from this soup's smell, it seems delicious.
さえN3
Meaning
Even
Past papers
Tested 2 times in past papers
Example
富士山の頂上は夏でさえ寒い。
It is cold on the summit of Mt. Fuji even in summer.
How to tell them apart
「からして」: starts from one point and judges the whole behind it. 「このレストランは、水からしてまずい」 (Even the water here tastes bad, so the food surely does too).
「さえ」: only stresses an extreme example, 'even ...'. 「子供さえ知っている」 (Even children know it).
When a question picks on one detail and criticizes everything from it, the answer is 「からして」.