Both in Semiconductor Manufacturing Equipment

Amtech Systems vs Sono-Tek

Over the past year ASYS returned +63.9% and SOTK returned +0.9%; their daily moves had a correlation of 0.23.

ASYS +63.9% SOTK +0.9%Growth of $1, one year, split-adjusted
MetricASYSSOTK
Price$12.80$4.70
Market cap$224.1M$74.0M
Today+3.90%−1.47%
1 month−28.2%−31.0%
6 months−28.6%−2.5%
Year to date+2.0%+13.8%
1 year+61.4%+4.0%
Revenue growth (YoY)+14.5%+1.3%
Gross margin50.0%52.9%
Net margin7.4%7.0%
P/E (TTM)56.0×36.9×
Price / sales2.7×3.4×
Net cash$82.9M$17.8M
Dividend yield——
Volatility (60d)66.4%72.0%
Short % of float11.8%0.5%
Next earnings——

Shading marks the stronger figure where one clearly exists (lower is better for valuation and volatility).