それに対して details

Examples

by contrast; whereas — states the opposing side of what was just described

去年きょねんの応募者おうぼしゃは百人ひゃくにんほどだった。それに対たいして、今年ことしは三百人さんびゃくにんを超こえた。

kyonen no oubosha wa hyakunin hodo datta. sore ni taishite, kotoshi wa sanbyakunin o koeta.

Last year's applicants numbered about a hundred. This year, by contrast, the figure passed three hundred. neutral

姉あねは何なんでもよく食たべます。それに対たいして、弟おとうとは好すき嫌きらいがとても多おおいです。

ane wa nan demo yoku tabemasu. sore ni taishite, otouto wa sukikirai ga totemo ooi desu.

My sister eats anything and everything. My younger brother, by contrast, is an extremely picky eater. neutral

会場かいじょうにお越こしの皆様みなさまには資料しりょうを無料むりょうでお配くばりいたします。それに対たいして、オンラインでのご視聴しちょうは有料ゆうりょうとなります。

kaijou ni okoshi no minasama ni wa shiryou o muryou de o kubari itashimasu. sore ni taishite, onrain de no go shichou wa yuuryou to narimasu.

For everyone attending in person, we will hand out the materials free of charge. Online viewing, by contrast, is paid. formal

in response to that — what was said or done back, aimed at the previous sentence

野党やとうは詳くわしい説明せつめいを求もとめた。それに対たいし、大臣だいじんは問題もんだいはないと述のべた。

yatou wa kuwashii setsumei o motometa. sore ni taishi, daijin wa mondai wa nai to nobeta.

The opposition demanded a detailed explanation. In response, the minister said that there was no problem. neutral

に対して
それに対して is 〜に対して with それ standing in the noun position, so both of に対して's jobs survive at the head of a sentence — a reaction aimed at what was just said, or a fact set against it — and which one you read depends on whether the second clause answers the first or merely stands beside it.
一方で
The clause-final 〜一方いっぽうで keeps both sides inside one sentence and does not need the first side closed off; それに対して stands at the head of its own sentence and puts the two sides on the same measure explicitly, which is why figures and rival options take it.
に比べて
に比くらべて makes one side the yardstick and the other the thing being judged (去年きょねんに比くらべて暖あたたかい), so the sentence ends up about the second side alone; それに対して leaves both sides equally in view and states each one in full.
一方
それに対して points back at the previous sentence explicitly and wants the two halves measured on the same dimension (百人ひゃくにんと三百人さんびゃくにん, 無料むりょうと有料ゆうりょう); 一方 only turns the reader's attention elsewhere, so it carries a loose pairing — two regions, two departments — that それに対して would make sound like a direct comparison.

それにしては
Four connectives open on それに and what follows decides — bare それに simply adds another point, それに対たいして either sets the new sentence against the old one or answers it, それにしても grants the old one and asserts anyway, それにしては measures against it and reports a shortfall.