The Log-Likelihood is computed in two dfferent ways, depending on whether the VECM was estimated with ML (Johansen) or 2OLS (Engle and Granger). When the model is estimated with ML, the LL is computed as in Hamilton (1994) 20.2.10 (p. 637):
$$LL = -(TK/2) \log(2\pi) - (TK/2) -(T/2) \log|\hat\Sigma_{UU}| - (T/2) \sum_{i=1}^{r} \log (1-\hat\lambda_{i})$$
Where $\Sigma_{UU}$ is the variance matrix of residuals from the first auxiliary regression, i.e. regressing $\Delta y_t$ on a constant and lags, $\Delta y_{t-1}, \ldots, \Delta y_{t-p}$. $\lambda_{i}$ are the eigenvalues from the $\Sigma_{VV}^{-1}\Sigma_{VU}\Sigma_{UU}^{-1}\Sigma_{UV}$, see 20.2.9 in Hamilton (1994).
When the model is estimated with 2OLS, the LL is computed as:
$$LL = \log|\Sigma|$$
Where $\Sigma$ is the variance matrix of residuals from the the VECM model. There is hence no correspondance between the LL from the VECM computed with 2OLS or ML.