Most landscaping yew is hedge form or conical and will be extremely knotty. Irish yew or cemetery yew is pretty common as is Canadian yew (not pacific yew). There are a few other species but I believe all are generally the same hedge growth or conical form - branches from the ground up, super full etc. I’d request a picture and see what they look like - if they have the right growth form you might be able to get a good stave. The other consideration with yew are the conditions grown under. Generally landscaped trees will be watered well and low stress, growing quickly and with wide rings, not ideal for yew wood. But I’ve heard of decent bows made from landscape yew. I believe Del (of course, who else!) has had some luck with it. Good luck!