http://www.cello.org/Newsletter/Articles/jsbach.html
A Survey of Bach Suite Editions
by Tim Janof
. . .The following are the editions, or more accurately the editors, that I chose to study:
Hugo Becker
Diran Alexanian
Pierre Fournier
Casals-Foley
Janos Starker
August Wenzinger
Dimitry Markevitch
. . .
Diran Alexanian (1929)
And then came the great Pablo Casals. What is remarkable about Casals was that, though he still lived in a time when little was yet known about Baroque music or its performance practice, his magnificent musical instincts often led him to play Bach in a manner that has now been proven to be consistent with musicological research. With Pablo Casals, the performance practice of Bach and cello technique would never be the same again.
Diran Alexanian was a protege of Casals and therefore his work reflects the influence of his teacher. Alexanian was obviously a brilliant man. His edition is the great analytical edition, which is still used throughout the world. He analyzed the function of each note and its relationship to its neighbors and to the larger phrase. In order to communicate his ideas, he developed a curious notation that takes getting used to, but ultimately gives one greater insight into the Suites.
. . .
Pierre Fournier (1972)
Pierre Fournier seems to have focused his energies into the production of a smooth and beautiful sound (what nerve!). Perhaps, because he was more of a product of the recording age, he chose this approach since it sounds "better" on recordings. To accomplish this, he tended to slur more notes together, resulting in a more even tone. . .
The advantage of Fournier's slurring is that it is easier to produce a lush and smooth sound. The disadvantage is that the overall energy level of the performance is reduced since fast notes on separate bows sound more lively. It is hard to play with grit and energy if everything is slurred.