The question rests on the word "less." The wording behind it is worth reading before you rely on it.
What the evidence is said to show
The published claim is less pain after the operation. A paper in PubMed Central reports that minimally invasive bunionectomy has gained popularity, namely due to evidence showing reduced recovery time, earlier weight-bearing, and less post-operative pain which can eliminate the need for opioids, all of which are beneficial to older surgical patients.
The conditions inside that sentence
Three details shape the answer. The benefit is tied to evidence of less post-operative pain, not to a guarantee for each patient. The sentence says pain relief "can" eliminate the need for opioids, which is not the same as "will." And it frames the benefit as beneficial to older surgical patients, so the group it speaks about is narrower than every reader.
To compare procedures, one PubMed Central paper sets out clinical and radiographic outcomes of minimally invasive chevron bunionectomy compared with the modified Lapidus procedure. The Royal National Orthopaedic Hospital patient guide to bunions and lesser toe deformities is a plainer starting point.
What to confirm, and with whom
Ask the surgeon which procedure is being proposed for your foot and what pain control is planned afterward. Do not accept "minimally invasive" as an answer to the second question. Readers in Itasca who compare more than one office can ask the same two questions at each, which makes the answers easy to line up.
The word that does the work
"Less" is a comparison, and a comparison needs two sides. When a pamphlet says less pain, ask what it is less than.