Thanks for the information. I already have a decent pool cue, just don't really understand the differences. Rethunk - those links are helpful.
Your typical US pool cue is a two piece with a large tip around 12mm or so and weighing around 18 to 20 oz has a maple shaft and a butt with fancy inlays.The finish on them is often varnish.
A typical Snooker cue is either a one piece or a 3/4. Two piece cues have become a part of history no one bothers with them nowadays. Many swear that a one piece gives you a better feedback over a 3/4 jointed cue but theres hardly any difference really.( big cue case big willy syndrome

)
Joints are almost all brass to brass as are the ferrules. Wood to wood joints which were popular in two piece cues are again almost extint, brass being far more hardwearing and thus stable. (I prefer a one piece purly because thers no joint that could possibly go wrong)
The one piece is one usually ash (maple, pearwood, hornbeam, hickory and a few other types have been used over the years but the majority prefer ash.Spliced to the base are four pieces of ebony (rosewoods also used but ebony accounts for the vast majority) It's having that full length of ash that many one piece fans swear gives them the better feedback.
Your 3/4 can be made as a one piece then cut at 3/4 or as a solid ebony but joined to a 3/4 length spliced shaft. Further decorative splices in the butt are optional.
Tips on a snooker cue generally vary from 8.5mm to 10mm to suit the 2+ 1/16th sized balls below 8.5mm and the cues invariably used as a uk pool cue where the balls are smaller still and playing with side is more common.
The taper of a snooker cue is effectively a straight throughout the length taper unlike most pool cues and old english billiards cues where the taper starts some 7" or thereabouts from the tip. Snooker players rarely use a closed bridge so an even length piece does not matter.
The weight of a snooker cue can vary considerably from as low as 14 oz and up to 22 or even more as its purely down to personal preference but 17-18 oz is typical as is a balance point around 16-18" as measured from the butt. (Added weights if any are usually lead and not adjustable as they are place in the butt and or the shaft in a jointed cue.
The flat part is a throwback to the mace left there as a traditional thing now as its only purpose is for somewhere for the cuemaker to put his badge.
Premium Ash shafts can be but are not always better than any other but fetch a premium price as they are cosmetically more appealing with even v's alone the one side (usually the top / badge up side) which many use to sight by and have two sides of tight straight grain. Again its a personal thing but i love to see tight straight grain to me i think if its evenly grained then it's evenly dense. wild grain especially with knots in it just say cheap wood cheap made.
The finish of a snooker cue is second only to the type of tip your using imo although most cuemakers will say the most important thing is the shaft.
Proper cues are oiled (raw linseed oil historically) some are the finished with beeswax others left just oiled.
Nothing is more comfortable, or more natural than a properly oiled cue and in my book anything else is is inferior. looked after and used with clean hands you'll never need any poncy whacko jacko gloves or talc.
Tips ? well thats another story.