から見ると・からすると・からすれば: the difference
から見るとN2
Meaning
From the point of view of, By the look of
Past papers
Example
外から見ると、やりやすそうです。
From an outside point of view it looks easy.
Meaning
Judging from, Considering
Past papers
Tested 3 times in past papers
Example
あの煙突からすると、たぶん薪ストーブですね。
Judging from that chimney, maybe it is a wood stove.
How to tell them apart
The clues for 「からすると」 are wider: what you see, hear, a tone of voice, even abstract hints. 「あの咳の仕方からすると、ただの風邪じゃない」 (Judging by that cough, it's not just a cold). For things you hear, you can't use the visual 「から見ると」.
「から見ると」 leans toward a line of sight, charts and data, or a broad position: 「図から見ると」 (looking at the chart).