The phrase "a second difference is that" is correct and usable in written English.
It can be used when comparing two or more items and highlighting an additional distinction between them.
Example: "When analyzing the two studies, a second difference is that the sample sizes were significantly different."
Alternatives: "another distinction is that" or "a further difference is that".
A second difference is that the recall period of both instruments is different: today for EQ-5D, versus the last four weeks (or one week in the acute version of the SF-36) for the SF-6D.
A second difference is that the Democratic Party is far less ideologically divided today than it was 50 years ago.
A second difference is that Hlinka's English is said to be rough, and it is not known if he speaks any French.
A second difference is that, unlike most local authority-run pupil referral units, The Lighthouse Group takes teenagers before matters at school have escalated to the stage where they've been permanently excluded.
A second difference is that classical chaotic dynamics has a continuous energy spectrum associated with its motion.
A second difference is that during the later period devaluations have invariably been effected by nations expanding their money supplies either by creating money to buy foreign currency, in the case of direct interventions, or by creating money to inject into their domestic economies, with quantitative easing.
A second difference was that the present testing procedure was continuous, so that the rats were not handled between trials and testing occurred within the same session.
A second difference was that education was targeted at improving knowledge and clinical practice in relation to the four key messages that were identified by the working party (Table 1).
A third difference is that "Little Women" portrays a matriarchal household made up of a mother, her daughters and their cook.
A third difference is that unlike 'way', dao may be used as a verb.
A first difference is that the photoresist is not exposed with UV light but is directly ablated with short excimer laser pulses.
