From a basic routine based around few exercises, but worked hard and intelligently, often a person will put on size and obviously get stronger but will not necessarily have the shapely, separated muscle look. Training with higher volume and more exercises is more likely to produce this look...
Diet Is The Key
As Antti noted, the key to increasing muscle mass and having "shapely, separated muscle" is you diet.
Heavyweight Powerlifters, Olympic Weightlifter and Strong Men all have "shapely, separated muscle"; however, it all buried under a few layers of body fat.
but at a cost of having to spend much longer at the gym. Calisthenics routines will often result in great abs and a wiry, lean physique but rarely produce much int he way of mass assuming chemical assistance is nit used!:
Exercise Is A Poor Method of Burning Fat
Spending longer in the gym, calisthenics, etc will NOT make you give you a wiry, lean physique.
Metabolic Training via High Intensity Interval Training minutely increases caloric expenditure. Exercise slightly increase you metabolic rate (burning more calories post workout) and preserving muscle mass when you on a caloric restricted diet.
Exercise also increase muscle mass. However, if you were to increase you muscle mass by one pound (which is a lot), you daily caloric expenditure would ONLY go up about 80 Calories A Day!
Theoretically, if nothing else changed that would mean you'd burn 2400 additional calories of body fat in a month, losing .68 lbs a month and 8.22 lb of a year.
Research shows the "Net" increase in caloric expenditure of adding a pound of muscle (which is a lot and hard to do) is approximately 4 calories per hour at rest.
Mathematically, that equates to 96 calories per day (24 X 4 = 96) of body fat burned.
However, it doesn't work that way.
All of the weight loss/fat loss program promoted on TV (P90X, Insanity, etc) as well as the Bowflex TV Commercials on their Max Trainer and HVT (High Velocity Training Gym) come with a Diet Plan.
The foundation of all of the above method and all other Metabolic Training Program for achieving fat loss and obtaining the "wiry, lean physique" you referred to are ONLY produce with diet, calorie restriction.
The reason for that is foundation for the following adages...
1) "You CAN'T out train a bad diet."
2) "Abs are made at the table."
Training with higher volume and more exercises is more likely to produce this (wiry, lean physique) look.
NO!!! Training ALONE without ANY diet modification/decrease in calorie intake will NOT "Produce this look."
Kenny Croxdale